Governing mechanism



Oct. 1, 194 0. 555 2,216,569

GOVERNING MECHANISM Original Filed Nev vb 2, 195a HGEL INVENTOR: John .HJd'ess;

ATTORNEYS.

Patented Oct. 1, 1940 warren? stares rarest or ies 2,216,569 GOVERNING MECHANISM John A. Hess, Columbus, Ohio 3 Claims.

This invention has reference to governor mechanism of the type responsive to speed variations of a centrifugal device in turn controlling the admission of motive medium to a turbo-gener- 5 ator unit.

More specifically, the present invention is a division from my prior U. S. application for patent filed November 2, 1938, and which later matured into Patent No. 2,194,166, dated March 10 19, 1940, and the instant improvements have reference to a novel form of coupling connection between the pivotal lever arm, remote from its fulcrum, and the motive fluid valve stem, the primary object being to eiiectively prevent any 15 sidewise or vi ratory motion between the parts aforesaid.

Another object is the provision of a novel coupling connection of the specified character which obviates undesirable wear between the coupled parts, with a co-related effect upon the valve movable member relative to the valve body portion.

With the above recited and subsidiary objects in view, as well as ancillary advantages, this 25 invention comprises certain novel items of construction, and the combination and arrangement of parts, such as are set forth with particularity in the following description, when considered in conjunction with the accompanying sheet of 30 drawings, and as more concisely expressed in the concluding claims.

In the drawing:

Fig. I is a broken elevational view through the governing mechanism end of a turbo-gener- 35 ator, and associated motive fluid valve, showing the improved coupler means of this invention in-- cluded therein.

Fig. II is a vertical section on the plane II-II of Fig. I.

4 Fig. III is an enlarged perspective View of a valve yoke housing included in the coupler means of this invention; and,

Fig. IV is a perspective View of a floating contact coactive with the housing of Fig. III, as hereinafter fully explained.

In the following disclosure considered in conjunction With the drawing, corresponding reference characters are applied to similar parts, while specific terms are employed for the sake of clarity. 50 It is to be understood, however, that such terms are non-limitatively used, but are intended to include all technical equivalents serving to accomplish an analogous purpose.

Referring more in detail to the drawing, and

55 by way of better clarifying the present improvements, the reference character 5 comprehensively designates the governor portion of a standard type turbo-generator unit for locomotives, 6 the casing and l the cover component. The rotary bearing is indicated at 8, the same being suitably 5 attached to the unit armature-shaft 9, while I0 generally designates the governor, and H the stem thereof, which coacts with the conventional lever arm 5 2, said lever arm being pivotally suspended at i3 from an adjuster element M 10 carried by a projection IS in the unit casing 6; while the lever arm I2 is provided with a tongue it, all preferably as set forth in the prior application hereinbefore referred to.

In accordance with the present improvements and to provide a positive coupler-operating connection between the lever arm tongue l6, and the stem ll of the motive fluid supply Valve is, said tongue is appropriately shaped for coaction between the opposing and preferably elliptic-section parts E9 of a yoke 20, having an internally screw-threaded section 2| at one end adapted for adjustable and rigid attachment to the corresponding1y-threaded end of the inwardly-influenced valve piston 22, for example as by a cotter device 23.

It will also be seen the yoke 20 other end 'is interiorly screw-threaded for reception of a hollow cap 24, having a concaved axial recess 25, affording bearing for the outer convened end 26 30 of a floating contact member 21. This floating member 21, as best seen in Fig. IV, preferably embodies axially-aligned opposedly-directed stud-like portions 28, 29, respectively, of differential diameter, and an intermediate collar section 30. The stud part 28 embodies the hemispherically convexed end 26 engageable in the concaved recess 25 of the cap 24, and the part 20 freely passes through an axial aperture 3!, and has a convexed end 32 of greater curvature 0 than the end 26 for contact withthe tongue IE or lower extremity of the lever arm l2. Thus it will be readily understood that the inner end or stud part 29 of the floating member 27 is free to move laterally within certain limits, defined by the diameter of the aperture 3!, hence a reasonable amount of sidewise vibration of the lever arm l2 can be absorbed without appreciable wear and without transmission of such vibrations to the valve piston stem II. It will also be obvious that the fluid supply valve stem I! being inwardly influenced, maintains the lever arm l2 in constant contact with the governor stem H, while the mechanism is operating.

From the foregoing it will be readily apparent that by the improved coupling connection of this invention, between the lever arm l2 and the valve stem I! is accurate and sensitive in operation, and that it substantially eliminates vibratory transmission between said parts.

Having thus described my invention, I claim:

1. The combination of a coupler connection for a governor influenced pivoted lever and the stern of a motive fluid supply valve comprising a yoke device adjustably sustained by the valve stem, means for securing the yoke device at the desired adjustment, a cap fitting the yoke device, and a, floating member afforded hearing at one end by said cap and oscillatably contacting the lever remote from its pivot at the other end, and means within the yoke member restricting sidewise movements of the lever to defined limits or without transmission thereof to the valve stem.

2. The combination of claim 1 wherein the yoke device embodies an internally screw-threaded portion with diametrically opposed ellipticsections bridged by a suitable attaching means, the cap fits the screw-threaded section and is provided with a concaved interior axial recess, and said yoke-device also includes an inner wall with a central aperture to define the lateral movement limits of the floating member.

3. The combination of claim 1 wherein the floating member embodies axially aligned studlike portions with an intervening collar section, said stud-like portions being of difierential diameters, the smaller of which has its free end rounded for conformatory engagement in the yoke member bearing cap, and the larger diameter stud-like portion free end is suitably convexed for oscillatory contact with the lever arm confronting end portion.

JOHN A. HESS. 

